If a guy loves you he won't blow you off for a game, trust me, my fiance is a gamer.
And you're young, so don't worry so much, give it more time, from personal experience I would never encourage dating the same guy twice. He'll most likely treat you the same way he did the first time around. I've tried the whole "give them a second chance thing" and it doesn't work out. (Tried it twice).
I understand how you feel, but don't stress it right now, there are plenty more bettas in the klong :P